1, for general wall dust, wipe it with a clean towel. If it is particularly dirty, such as black handprints and footprints, you can gently wipe it with an eraser.
2. If it is a waterproof wall, you can directly scrub it with water and then dry it with a dry towel; Water-resistant walls can be wiped with rubber, or gently wiped with a towel dipped in some cleaning liquid after wringing out.
3. If there are children's crayon graffiti on the wall, just touch some cream on the clean cotton cloth and gently wipe it. Because the cream contains emulsifier, it has a good wax removal effect.
4. Don't tear off the sticker left on the wall directly, it is easy to leave residual glue. You can blow it with a hair dryer first, and then gently pull it off after the tape becomes soft.
5. For the special dirt with unknown reasons, you can wipe it with bread or with old wool socks and sandpaper.
6. For the sauce on the wall, apply it with 1% hydrogen peroxide, which can be applied to a large area after it is effective.
Note: concentrated hydrogen peroxide has strong decoloration and corrosiveness, and 1%-3% is safe.